TLUD dimensions on concentrator holes and chimneys

Stovers,

Here are several messages from an non-list discussion about TLUD concentrator holes. Read the last (bottom) messages first if you want the sequence of the discussion.

I hope that all discussions of this nature can be on the Stoves Listserv (which is quite quiet for a while).

Paul

Doc / Dr TLUD / Paul S. Anderson, PhD
Exec. Dir. of Juntos Energy Solutions NFP
Email: psanders@ilstu.edu<mailto:psanders@ilstu.edu> Skype: paultlud
Phone: Office: 309-452-7072 Mobile: 309-531-4434
Website: www.drtlud.com<www.drtlud.com>

From: Anderson, Paul
Sent: Thursday, March 28, 2019 8:26 AM
To: ‘Norman Baker’ <ntbakerphd@gmail.com<mailto:ntbakerphd@gmail.com>>

From: Norman Baker <ntbakerphd@gmail.com<mailto:ntbakerphd@gmail.com>>
Sent: Thursday, March 28, 2019 12:40 AM

Paul;

I assume you mean the diameter of the stack or combustor?

[PSA>>] of the concentrator lid. 6 inch diameter fuel chamber with 3 inch diameter hole in the lid.

In prior tests with concentrator rings, a hole that has a diameter of 70% of the stack seem to be adequate.
[PSA>>] I agree with that, but it is a different question than the hole of the concentrator. I do not like a chimney to be the same diameter as the hole in the concentrator.

Lately, I have been going to about an 80% diameter.

In one publication I read the stack diameter should be at least 60% of the feedstock barrel diameter.
[PSA>>] That is a third question, and your response below sounds correct.
Paul

Otherwise the time needed for gases to exit the combustor became too fast and hence too short for complete combustion. Is this your experience? And how about the rest of you chiming in on this.

Norm

On Wed, Mar 27, 2019 at 8:05 PM Anderson, Paul <psanders@ilstu.edu<mailto:psanders@ilstu.edu>> wrote:
Norm,

In general, the diameter of the hole is about half of the diameter. But there might not be any visible (noticeable) impact if reduced or enlarge 10 to 20% of the size of the hole. Trial and error are your best bets to get this refined.

I look forward to hearing of your results.

Paul

From: Norman Baker <ntbakerphd@gmail.com<mailto:ntbakerphd@gmail.com>>
Sent: Wednesday, March 27, 2019 7:24 PM

Paul and everyone;

You are the one who is most familiar with concentrator rings and you suggested one for my large TLUD. Frankly, I’ve never been too terribly impressed with concentrator rings until I saw one in action at the TLUD Summit. I am planning on adapting one to my large TLUD. Are there guidelines or specifications for them? Should they be an area percentage of the stack or should they be in the area percentage of the feedstock barrel?

Norm